Window jam friction shoe
FIG. 1 is a front perspective view of a window jam friction shoe embodying my new design; 
     FIG. 2 is a front elevation thereof; 
     FIG. 3 is a rear elevation thereof; 
     FIG. 4 is a right side elevation thereof; 
     FIG. 5 is a top plan thereof; 
     FIG. 6 is a left side elevation thereof; and 
     FIG. 7 is a bottom plan thereof.